it's a tough needle that romney has to thread. somebody said, he has to be aggressive, that he has to be nice. he has to be aggressive taking the fight but he can't look mean. >> dave: as a former debate coach of john mccain, i believe. debates are substance style is style over substance. game changes. do they come down to mannerisms, how you say thing or personality? >> a combination. i think that any challenger just benefits from being on the same stage. to the agree you think he is the president and the other guy isn't. when you see the two of them on the stage, it automatically lifts the challenger to make it look he hat the same stature as the president. first of all if you plan too much with one liners, they are ready to do it. they know what each side is going to do. obviously you can see it. you have been talking earlier today about the obama people trotting out some of those bain employees that were laid off. their basic argument is going to be that he rich guy who is going to take us back to the policies of george w. bus